No way dude. 255lph pump and 39's would barely support your car with the s-trim on it, let alone the same boost with needing 30% more fuel. 2 FGT pumps supports about 530rwhp on E85 with 60lb injectors. You'll need another pump and 60's to support your power.
Thats impressive. I'd check your tune and see what the base pressure is set at in the tune as its probably jacked up really high, and you'll lose fuel volume at that pressure.
I didn't mean that I was running e85. Just wondering how you go about deciding how much is enough to support it. If my injectors and pump still have plenty left, what/where is the cutoff?
Are you at 50% duty cycle right now with those 2? If not, I wouldnt suggest running them E85. You'll need at least 30% duty cycle left in each to run E85. I think that running 80% duty cycle is a good thing and not maxing it out. But if you want to run 100% dc on them, you should start out with a regular petrol based fuel dc of 70% or less to start. I know of GT's at 8psi maxing out 255lph focus pumps at 8-10psi and 400rwhp. Just my input on the subject.